| 摘要 |
PURPOSE:To prevent leakage of gas from inside of a piping system and shield vibrations by a method wherein a pipe material the main component of which is high specific gravity metal prominent in the plastic fluidity, desirably lead, is used as an innermost diameter part of a joint, and a resinous recessed and protruded pipe is arranged on the outside of it. CONSTITUTION:Each end of a joint is provided with a copper pipe 1 to make the joint weldable, and has an expanded pipe part 1b for fixing and retaining a cover member. The copper pipe 1 is jointed with a lead pipe 2 through a soldering part 3. In this instance, it is desirable that a flow-in soldering part 3a is formed in a gap between the pipes 1 and 2 by capillarity, whereby the jointing strength is improved. Further, outside of it, there are provided a cover pipe 4 made of plastics or rubber, and a protection cover pipe 5 which is extendable in the vertical direction with respect to the inner pressure and the pipe diameter. These lead pipe 2, cover pipe 4 and protection cover pipe 5 are held tight with a hose bands 6 and 7. The joint is formed in the same shape at the both ends, and welded to a piping at a terminal part 1a. The inside of the cover pipe 4 is formed in a recessed and protruded pattern. |
